Trailer lock



F. M REID ERAILER LOCK Dec. 22 1925. 1,566,617

Filed Feb. 21, 1925 2 Sheets-Sheet 1 INVEN.TOR 1 azderzc MZaaZzn 72x3 Dec. 22; 1925. 1,566,617

F. M. R ElD TRAILER LOCK File d Fb. 21, 1925 2 Sheets-Sheet 2 WVFNTM C%aiembi 765% A TTORNEY.,

Patented Dec. 22,1925.

UNITED STATES :PATENTOFFICE.

mnmcx IIALCOLI REID, OI DETROIT. IIOHIGAN, ASSIGNOB. TO IRUIHAOT mm OOIPANY, OI DETROIT, IICHIGAIT, CORPORATION OF MICHIGAN.

Tasman Loox.

' Application fled February a1, 1925. semi No. 10,741.

To all whom it may concern:

Be it known that I, FREDERICK MALooLM Ram, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Trailer Locks, of

which the following is a specification.

This invention relates to center locking devices for trailers. It is the object of the showing the lock.

- respect to the attachment of the lever to this Fig. 3 is a vertical section taken on the line 3-3 of Fig. 2.

The trailer is provided with a drawhead a, which is provided with an integral lock table I) and is providedat the center with a keeper socket c. A springressed vertically guided bolt d is slidab e in the bolt housing e, which is riveted. to the chassis frame of the trailer. The keeper socket and the lock table, which are part of the drawhead, are riveted to the frame of the truck,

or what we sometime call the gear frame. The coil spring f engages against the shoulder on the bolt head and within the bolt socket and tends to project the bolt. On the top of the bolt housing is located a lever h which has an eccentric fulcrum g secured to the upper end of the bolt by means of the ivot in i. The ivot in is eccentrically ocate on the circu ar fu crum or roll of the lever at substantially a -degree point with roll or fulcrum. Now obviously by simply throwing the lever over from the position shown in the full lines to the position shown in the dotted lines in Fig. 2, the lock is taken from the position of action to the position of inaction. It will be seen that in the position shown in the full lines the lever, together with the roll fulcrum, can rise above the bolt bracket when the lower end of the bolt slides alon the table. When the gear frame reac es center position with respect to the chassis frame, the lock will automatically HEISSUED shoot into the keeper socket. This makes a very strong lock which can be easily manufactured and a plied to the chassis frame. The lock itself 1s a separate unit which may be manufactured as a unit and riveted as a unit to the chassis frame. The keeper socket simply is an integral part of the drawhead as is-also the table along which the lock slides.

What I claim is: a

1. A center lock for-vehicles, having in combination an upper member, a lower member, with two members arranged to have relative movement with respect to each other, a bolt guide housing on the one member, a table provided with a center keeper socket on the other member, a sliding-bolt guided in the bolt' guide and tending to project into the keeper socket when lined up therewith and means connected with the outer end 0 the slidin bolt and operating in direct connection w1th. thebolt guide housing to either release the bolt, for automatic projection into the keeper socket or else to set the bolt against projection intothe keeper socket.

2. A center lock for vehicles, having in combination an upper member, a lower member, the two members arranged to have relative movement with respect to each other, a bolt guide housing on the one member, a table provided with a center keeper socket on the other member, a sliding bolt guided in the bolt guide and tending to project into the keeper socket when lined up therewith, and a lever which can be thrown from one side to the other and which is connected at the outer end of the bolt and operates in direct connection with the bolt guide housing for throwing the bolt out of operation or releasing the bolt for automatic projection into the keeper socket.

3. A center lock for vehicles, having in combination an u per member, a lower member, the two mem ersarranged to have relative movement with respect to each other, a mo bolt guide housing1 on the one member, a table provided wit a center keeper socket on the other member, a sliding bolt guided in the bolt guide housing and tendin to project into the keeper socket when line u therewith, and a lever having a roll-like fu crum eccentric'ally connected with the outer end of the bolt and bearing against the guide housing so that by throwing the leverto the no one side of center the bolt is held out of operation and turning it to the other side vided with a center keeper socket secured 10 of center the bolt is released for automatic to the ear frame, and a lever having a roll- I projection into the keeper socket. like fu crum bearing on the top ofthe bolt .4. A look for trailers and gear frames, guide bracket and having an eccentric pivot I havin in combination with a trailer and a connection with the upper end 01' the bolt.

gear rame, a lock uide bracket which can In testimony whereof I have afiixed my be secured to the trader frame, a bolt guided signature. vertically in said bracket, a spring for projecting the bolt downwardly, a table pro- FREDERICK MALCOLM REID. 

